EP0270474B1 - Système de régulation à vitesse variable pour un compresseur à commutation électrique - Google Patents
Système de régulation à vitesse variable pour un compresseur à commutation électrique Download PDFInfo
- Publication number
- EP0270474B1 EP0270474B1 EP87630245A EP87630245A EP0270474B1 EP 0270474 B1 EP0270474 B1 EP 0270474B1 EP 87630245 A EP87630245 A EP 87630245A EP 87630245 A EP87630245 A EP 87630245A EP 0270474 B1 EP0270474 B1 EP 0270474B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- compressor
- error
- electrically commutated
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1913—Control of temperature characterised by the use of electric means using an analogue comparing device delivering a series of pulses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1201—Rotational speed of the axis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S388/00—Electricity: motor control systems
- Y10S388/923—Specific feedback condition or device
- Y10S388/93—Load or torque
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S388/00—Electricity: motor control systems
- Y10S388/923—Specific feedback condition or device
- Y10S388/934—Thermal condition
Definitions
- the invention herein is directed toward control systems, and particularly control systems for electrically commutated, variable speed (i.e. ECM) motor driven compressors used in heat pump systems.
- ECM electrically commutated, variable speed
- variable speed motor driven compressors At present, there is considerable speed variation from unit to unit in electrically commutated, variable speed motor driven compressors.
- the speed variation in typical electrically commutated, variable speed motor driven compressors may be as great as twenty (20) percent from a given nominal value, particularly with open loop electrically commutated motor controllers.
- US-A-4 250 435 discloses a motor control system for an electronically commutated (ECM) variable speed motor employing feedback to maintain the actual motor rotational speed at a desired speed.
- the desired motor rotational speed is commanded by an input clock signal.
- a sensor is provided to sense the actual motor position which is periodically compared with a desired instantaneous motor position which is indicated by the time of occurrence of an input clock signal.
- GB-A-2 086 617 discloses a method of controlling an air conditioning system having an AC electric motor driven compressor connected to an AC electric power source of a variable frequency. The temperature of the air to be conditioned is sensed and the frequency of the AC electric power source is adjusted to one of a plurality of discrete set values determined in accordance with the deviation of the detected temperature with reference to a set temperature.
- the invention herein directs itself toward a heat pump control arrangement or system based upon a logic sequence effective for monitoring and correcting compressor operating speed in view of compressor loading conditions such as for example differences between a temperature set point and room ambient temperature.
- a conversion of speed control signal to operational duty cycle information is accomplished, and the result is provided to the ECM controller, enabling the controller to vary compressor speed in view of a duty cycle input speed request.
- the controller further applies a time delay during compressor speed change, concurrently monitoring compressor speed repeatedly, based upon commutating pulses from the motor controller.
- the monitored speeds are compared to a requested speed indication to establish an error signal, which in turn in converted into a duty cycle indication for input to the motor controller, thereby establishing closed loop compressor speed control effective for maintaining compressor speed within predetermined limits.
- a method of controlling the operational speed of an electrically commutated motor (ECM) compressor comprises the features of claim 2.
- FIG. 1 shows in block diagram form, a heat pump control arrangement 13, according to the invention herein.
- the heat pump control arrangement 13 includes compressor speed logic element 14 effective for producing a signal indication 14 ⁇ of desired or requested speed.
- compressor speed logic element 14 produces requested speed indication 14 ⁇ by establishing old and new room ambient temperature differences "d o " and "d n " and setting indication 14 ⁇ equal to the quantity d n K1+(d n _d o )K2, where K1 and K2 are experimentally developed system characteristic constants.
- the old and new room ambient temperatures "d o " and d n are considered old and new history indications with respect to a thermostat selected set point temperature "t s ".
- indication 14 ⁇ is a percentage volume between zero (0) and one hundred (100) indicative of the desired or requested speed levels to be input for operation of compressor 25, according to the invention herein.
- Indication 14 ⁇ is combined with a calculated speed indication 19 ⁇ from compressor speed calculation element 19, which is also a percentage value, and is representative of an RPM feedback signal indication 21 ⁇ from the electrically commutated motor controller 22 effective for controlling and monitoring the status of electrically commutated motor compressor 25.
- controller 22 can be a GE, Ft. Wayne source controller which monitors the back EMF on the power lines connected to the compressor motor poles (not shown), in terms of electrical signals developed, and produces voltage (i.e. RPM feedback) signals indicative thereof.
- Compressor speed calculation element 19 receives the pulsed analog form of the feedback speed indication 21 ⁇ in form usable by the control arrangement 13, which is preferably microprocessor based, for example employing an Intel 8032 device, according to one version thereof. More particularly, compressor speed calculation element 19 measures the period between pulses of the RPM feedback signal 21 ⁇ .
- Indications 14 ⁇ and 19 ⁇ are combined at element 30 to produce a difference or error signal 30 ⁇ , which expresses the deviation between desired and actual speed values for the compressor.
- the error signal 30 ⁇ is accepted by duty cycle generator 33 established for example as a microprocessor look-up table, which produces a speed control signal 33 ⁇ effective for driving the electrically commutated motor controller 13, according to the invention herein.
- the generator 33 modifies the width of output pulses in view of its input.
- Figure 2 is a flow chart which shows the general operation of the arrangement in Figure 1.
- operation begins by setting a desired, requested or selected compressor speed as signal indication 14 ⁇ , as suggested by block 114 in Figure 2, and establishing an RPM feedback speed signal or indication 21 ⁇ , as represented by block 121 ⁇ in Figure 2. Further, a calculation of compressor speed based upon the indicated feedback speed signal 21 ⁇ is made at compressor speed calculation element 19 as suggested at block 119 of Figure 2.
- an error signal 30 ⁇ is developed between the result of the speed calculation of block 119, i.e. calculated speed indication 19 ⁇ , and the speed as set at block 114 according to logic element 14.
- a speed control signal or indication 33 ⁇ is produced, as suggested at block 133 in Figure 2, enabling effective current control and modification of compressor speed as operation proceeds through intervention of ECM controller 22.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/936,423 US4734628A (en) | 1986-12-01 | 1986-12-01 | Electrically commutated, variable speed compressor control system |
US936423 | 1986-12-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0270474A1 EP0270474A1 (fr) | 1988-06-08 |
EP0270474B1 true EP0270474B1 (fr) | 1991-02-20 |
Family
ID=25468608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87630245A Expired - Lifetime EP0270474B1 (fr) | 1986-12-01 | 1987-11-19 | Système de régulation à vitesse variable pour un compresseur à commutation électrique |
Country Status (7)
Country | Link |
---|---|
US (1) | US4734628A (fr) |
EP (1) | EP0270474B1 (fr) |
JP (1) | JPS63161887A (fr) |
KR (1) | KR900003681B1 (fr) |
BR (1) | BR8706362A (fr) |
CA (1) | CA1313550C (fr) |
ES (1) | ES2021086B3 (fr) |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4856286A (en) * | 1987-12-02 | 1989-08-15 | American Standard Inc. | Refrigeration compressor driven by a DC motor |
US5023531A (en) * | 1988-05-19 | 1991-06-11 | Arx, Inc. | Dual hybrid demand refrigeration control apparatus |
JPH0255590A (ja) * | 1988-08-16 | 1990-02-23 | Mitsubishi Electric Corp | モータ制御装置 |
US5339013A (en) * | 1990-02-14 | 1994-08-16 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for driving a brushless motor including varying the duty cycle in response to variations in the rotational speed |
US5271238A (en) * | 1990-09-14 | 1993-12-21 | Nartron Corporation | Environmental control system |
US5095715A (en) * | 1990-09-20 | 1992-03-17 | Electric Power Research Institute, Inc. | Electric power demand limit for variable speed heat pumps and integrated water heating heat pumps |
US5220255A (en) * | 1990-10-12 | 1993-06-15 | Lennox Industries Inc. | Interface for interconnecting a thermostat and an electronically commutated motor |
US5664048A (en) * | 1990-11-14 | 1997-09-02 | Abbott Laboratories | Speed control circuit for a DC motor |
US5202951A (en) * | 1991-06-05 | 1993-04-13 | Gas Research Institute | Mass flow rate control system and method |
US5341453A (en) * | 1991-06-25 | 1994-08-23 | Hill Norman M | Apparatus and methods for realistic control of DC hobby motors and lamps |
US5203179A (en) * | 1992-03-04 | 1993-04-20 | Ecoair Corporation | Control system for an air conditioning/refrigeration system |
DE4232130A1 (de) * | 1992-09-25 | 1994-03-31 | Teves Gmbh Alfred | Verfahren und Schaltungsanordnung zur Regelung der Förderleistung einer Hydraulikpumpe |
US5489831A (en) * | 1993-09-16 | 1996-02-06 | Honeywell Inc. | Pulse width modulating motor controller |
US5528229A (en) * | 1993-10-29 | 1996-06-18 | Hunter Fan Company | Thermostatically controlled remote control for a ceiling fan and light |
DK174114B1 (da) * | 1996-10-09 | 2002-06-24 | Danfoss Compressors Gmbh | Fremgangsmåde til hastighedsregulering af en kompressor samt styring, der gør brug af fremgangsmåden |
JP3716061B2 (ja) * | 1996-10-25 | 2005-11-16 | 三菱重工業株式会社 | ターボ冷凍機 |
DE19702949A1 (de) * | 1997-01-28 | 1998-07-30 | Stribel Gmbh | Steuergerät |
DE19753425C1 (de) * | 1997-12-02 | 1999-08-12 | Liebherr Hausgeraete | Verfahren zur Steuerung der Drehzahl eines Kompressormotors eines Kühl- oder Gefriergeräts |
JP3967012B2 (ja) * | 1998-08-24 | 2007-08-29 | カルソニックカンセイ株式会社 | ブラシレスモータの制御装置 |
US6369536B2 (en) | 1999-12-27 | 2002-04-09 | General Electric Company | Methods and apparatus for selecting an electronically commutated motor speed |
AT411632B (de) * | 2000-04-19 | 2004-03-25 | Tech Alternative Elektronische | Verfahren zum regeln der entnahmetemperatur von brauchwasser |
US6769265B1 (en) | 2003-03-12 | 2004-08-03 | Maytag Corporation | Variable speed refrigeration system |
US7490480B2 (en) * | 2003-03-14 | 2009-02-17 | Maytag Corporation | Variable speed refrigeration system |
GB0310643D0 (en) | 2003-05-09 | 2003-06-11 | Rolls Royce Plc | Pump control system |
CA2455011C (fr) | 2004-01-09 | 2011-04-05 | Suncor Energy Inc. | Traitement de mousse bitumineuse par injection de vapeur en ligne |
DE102004007154A1 (de) * | 2004-02-12 | 2005-08-25 | Robert Bosch Gmbh | Pumpenregelung |
JP4954484B2 (ja) * | 2005-03-08 | 2012-06-13 | ホシザキ電機株式会社 | 冷却貯蔵庫 |
WO2007096436A1 (fr) * | 2006-02-20 | 2007-08-30 | Appliances Components Companies, S.A. | Procédé de contrôle de régime |
US7739882B2 (en) * | 2006-02-28 | 2010-06-22 | Dometic, LLC | Variable speed control |
US7590499B2 (en) * | 2006-06-28 | 2009-09-15 | Computime, Ltd. | Recording and conveying energy consumption and power information |
WO2009096968A1 (fr) * | 2008-01-31 | 2009-08-06 | Carrier Corporation | Établissement de cycles rapides pour compresseur |
US7975506B2 (en) | 2008-02-20 | 2011-07-12 | Trane International, Inc. | Coaxial economizer assembly and method |
US9353765B2 (en) * | 2008-02-20 | 2016-05-31 | Trane International Inc. | Centrifugal compressor assembly and method |
US7856834B2 (en) * | 2008-02-20 | 2010-12-28 | Trane International Inc. | Centrifugal compressor assembly and method |
US8037713B2 (en) * | 2008-02-20 | 2011-10-18 | Trane International, Inc. | Centrifugal compressor assembly and method |
KR20100018230A (ko) * | 2008-08-06 | 2010-02-17 | 학교법인 두원학원 | 차량용 공조장치의 인버터 일체형 전동압축기 제어방법 |
EP2414749B1 (fr) | 2009-04-03 | 2019-06-19 | Carrier Corporation | Systèmes et procédés impliquant la commande d'un système de chauffage et de refroidissement |
US8355855B2 (en) * | 2010-05-21 | 2013-01-15 | General Electric Company | Systems and methods for controlling an integrated drive train |
JP5378630B1 (ja) * | 2012-03-02 | 2013-12-25 | パナソニック株式会社 | 電動圧縮機の制御方法、制御装置、及び冷蔵庫 |
US9417638B2 (en) * | 2012-12-20 | 2016-08-16 | Automotive Research & Testing Center | Intelligent thermostatic control method and device for an air conditioner blowing cold and hot air |
US9476626B2 (en) | 2014-08-29 | 2016-10-25 | Emerson Climate Technologies, Inc. | Variable speed compressor control with lost rotor mitigation |
BR102016024765B1 (pt) * | 2016-10-24 | 2023-10-10 | Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda | Sistema e método de alimentação elétrica e controle eletrônico de um compressor de capacidade variável incorporado a um refrigerador |
CN108005881B (zh) * | 2017-11-30 | 2019-09-17 | 博耐尔汽车电气系统有限公司 | 一种电动压缩机的调速方法 |
CN109489207B (zh) * | 2018-11-19 | 2019-10-11 | 奥克斯空调股份有限公司 | 一种电机启动控制方法、装置及空调器 |
US11592225B2 (en) * | 2020-11-24 | 2023-02-28 | Lennox Industries Inc. | Method and system for the heat-pump control to reduce liquid refrigerant migration |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1593361A (en) * | 1977-05-09 | 1981-07-15 | Borg Warner | Control system for regulating large capacity rotating machinery |
US4258301A (en) * | 1977-10-21 | 1981-03-24 | Ricoh Company, Ltd. | Servo motor apparatus |
ZA792499B (en) * | 1978-06-01 | 1980-08-27 | Lnc Ind Ltd | Heat pumps |
JPS5928148B2 (ja) * | 1978-12-30 | 1984-07-11 | ファナック株式会社 | 誘導電動機の運転制御装置 |
US4259845A (en) * | 1979-02-08 | 1981-04-07 | Borg-Warner Corporation | Logic control system for inverter-driven motor |
US4282718A (en) * | 1979-09-12 | 1981-08-11 | Borg-Warner Corporation | Evaporator inlet water temperature control system |
US4257238A (en) * | 1979-09-28 | 1981-03-24 | Borg-Warner Corporation | Microcomputer control for an inverter-driven heat pump |
JPS6031196B2 (ja) * | 1979-12-11 | 1985-07-20 | ファナック株式会社 | 誘導電動機の可変速運転装置 |
US4250435A (en) * | 1980-01-04 | 1981-02-10 | General Electric Company | Clock rate control of electronically commutated motor rotational velocity |
US4417452A (en) * | 1980-01-04 | 1983-11-29 | Honeywell Inc. | Heat pump system defrost control |
IT1189012B (it) * | 1980-04-02 | 1988-01-28 | Bosch Gmbh Robert | Disposizione circuitale per alimentare un motore sincrono da una rete a tensione continua |
US4345442A (en) * | 1980-06-17 | 1982-08-24 | Mechanical Technology Incorporated | Control system for resonant free-piston variable stroke compressor for load-following electric heat pumps and the like |
JPS6012532B2 (ja) * | 1980-10-13 | 1985-04-02 | 株式会社東芝 | 空気調和装置の制御方法 |
US4371819A (en) * | 1980-12-11 | 1983-02-01 | Pako Corporation | Pulse width modulation speed control |
US4575667A (en) * | 1981-06-09 | 1986-03-11 | Fanuc Ltd | AC Motor speed control apparatus |
JPS58144687A (ja) * | 1982-02-24 | 1983-08-29 | Nissan Motor Co Ltd | 可変容量ロ−タリ−コンプレツサ |
US4581569A (en) * | 1982-11-02 | 1986-04-08 | Fanuc Limited | AC motor control apparatus |
GB2148553A (en) * | 1983-10-22 | 1985-05-30 | Chieftain Ind Plc | Heat pump system |
US4546618A (en) * | 1984-09-20 | 1985-10-15 | Borg-Warner Corporation | Capacity control systems for inverter-driven centrifugal compressor based water chillers |
US4608833A (en) * | 1984-12-24 | 1986-09-02 | Borg-Warner Corporation | Self-optimizing, capacity control system for inverter-driven centrifugal compressor based water chillers |
US4623827A (en) * | 1985-02-09 | 1986-11-18 | Ricoh Company, Ltd. | Device for controlling motor rotation speed |
US4590771A (en) * | 1985-05-22 | 1986-05-27 | Borg-Warner Corporation | Control system for defrosting the outdoor coil of a heat pump |
US4603283A (en) * | 1985-06-03 | 1986-07-29 | Bodine Electric Company | Variable speed control for a brushless direct current motor |
US4646534A (en) * | 1985-07-15 | 1987-03-03 | Earl Russell | Means for refrigeration speed control |
US4667480A (en) * | 1986-09-22 | 1987-05-26 | General Electric Company | Method and apparatus for controlling an electrically driven automotive air conditioner |
-
1986
- 1986-12-01 US US06/936,423 patent/US4734628A/en not_active Expired - Fee Related
-
1987
- 1987-11-12 CA CA000551677A patent/CA1313550C/fr not_active Expired - Fee Related
- 1987-11-19 EP EP87630245A patent/EP0270474B1/fr not_active Expired - Lifetime
- 1987-11-19 ES ES87630245T patent/ES2021086B3/es not_active Expired - Lifetime
- 1987-11-25 BR BR8706362A patent/BR8706362A/pt not_active IP Right Cessation
- 1987-11-26 JP JP62298843A patent/JPS63161887A/ja active Granted
- 1987-11-28 KR KR1019870013495A patent/KR900003681B1/ko not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
" Fachwissen des Ingenieurs " , VEB Fachbuchverlag Leipzig 1979, page 156 * |
Also Published As
Publication number | Publication date |
---|---|
KR900003681B1 (ko) | 1990-05-30 |
ES2021086B3 (es) | 1991-10-16 |
JPH0343861B2 (fr) | 1991-07-04 |
BR8706362A (pt) | 1988-07-26 |
CA1313550C (fr) | 1993-02-09 |
KR880007931A (ko) | 1988-08-29 |
US4734628A (en) | 1988-03-29 |
EP0270474A1 (fr) | 1988-06-08 |
JPS63161887A (ja) | 1988-07-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0270474B1 (fr) | Système de régulation à vitesse variable pour un compresseur à commutation électrique | |
US5559407A (en) | Airflow control for variable speed blowers | |
CA2092456C (fr) | Systeme de regulation a parametres multiples et dispositif de commande | |
EP1921392B1 (fr) | Appareil de commande d'un système de distribution d'air | |
US4978896A (en) | Method and apparatus for controlling a blower motor in an air handling system | |
US4806833A (en) | System for conditioning air, method of operating such, and circuit | |
US6607140B1 (en) | Method for precise electric actuator control with reduced repositioning | |
US4257238A (en) | Microcomputer control for an inverter-driven heat pump | |
US4856286A (en) | Refrigeration compressor driven by a DC motor | |
US5492273A (en) | Heating ventilating and/or air conditioning system having a variable speed indoor blower motor | |
US4540923A (en) | Adaptive servomotor controller | |
US5202951A (en) | Mass flow rate control system and method | |
EP1990584A2 (fr) | Contrôle de débit d'air pour ventilateurs à vitesse variable | |
EP0612960A1 (fr) | Système de contrôle d'écoulement d'air à tirage forcé | |
JPS63150551A (ja) | 空気調和システム及びそれに於ける圧縮機速度及び電動機速度の制御方法 | |
US6097171A (en) | Method and apparatus for controlling an induction motor | |
US5656912A (en) | Method and apparatus for controlling a motor | |
JPH05322279A (ja) | 空気調和機の制御装置 | |
KR960006363B1 (ko) | 냉동 시스템과 그의 제어 방법 | |
EP4123237A1 (fr) | Consommation d'énergie de veille zéro watt de moteur à commutation électronique | |
JPH08182374A (ja) | 直流ブラシレスモータ駆動制御装置 | |
JPH0345125A (ja) | 電力負荷制御装置 | |
JPH04203495A (ja) | 室内ファンモータの制御方法 | |
KR930006062B1 (ko) | 인버터 룸 에어컨의 한냉 지향방법 | |
MXPA96003940A (en) | Method and apparatus for controlling an mo |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19880401 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): ES GB IT SE |
|
17Q | First examination report despatched |
Effective date: 19890124 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): ES GB IT SE |
|
ITF | It: translation for a ep patent filed |
Owner name: UFFICIO BREVETTI RICCARDI & C. |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
EAL | Se: european patent in force in sweden |
Ref document number: 87630245.6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19981013 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19981020 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 19981111 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19991119 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19991120 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19991120 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19991119 |
|
EUG | Se: european patent has lapsed |
Ref document number: 87630245.6 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20001214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20051119 |